Umbrella base



FIG. 1 is a top perspective view of an umbrella base showing our newdesign;

FIG. 2 a side elevational view thereof, the other three sides beingidentical thereto; and,

FIG. 3 is a top plan view thereof.

The broken lines shown in FIG. 2 forming a trapezoidal shape immediatelyadjacent the shaded areas represents the bounds of the claimed design,and all other broken lines, shown in FIGS. 1-3 are for illustrativepurposes only. None of the broken lines form a part of our claimeddesign. The bottom of the umbrella base of our new design isunornamented and forms no part of our design.

The ornamental design for an umbrella base, as shown and described.